US2208334A - Horizontally reciprocating pump - Google Patents

Description

July 16, 1940. L M SHARP 2,208,334

HORIZONTALLY REGIPRO CATING PUMP "i J l W0 k INVENTORy JEFFERSON M, SHARP ATTORNEY July 16, 1940 J. M. SHARP HORIZONTALLY REQIPROCATING PUMP Filed April 17. 1939 4 Sheets-Sheet 2 INVENTOR I JEFFERSON M- SHARP ATTORNEY July 16, 1940.

'lili J. M. SHARP 2,208,334 ALLY RECIPROCAT N PUMP July 16, 1940.

J'. M. SHARP HORIZONTALLY RECIPROCATING PUMP 'Filed April y1'7, 1939 4 Sheets-Sheet 4 @o OQO O OO O 0.0000 CO @o O OO OO O O lNvENToR JEFFERSON M SHARP Patented `Iuly 16, 1940 'UNITED- ,STAT-es?" .HoRrzoN'rALLynnorrnooafrme rUMP Jefferson M. Sharp,

:Oil City, YPa., assigner to NationalA Transit Rump & Machine Company, Oil City, Fa., a corporation of Pennsylvania p, 'ApplicatinAprilrL1939, seriainmzesasr i claiinw (o1. 10a-172)V This invention `relates topumps of the horizontal, reciprocating plunger type which maybe single acting or double'` acting as" will clearly appear as this specification progresses, together l with the fact that this pump is adapted for pumping either hot or cold liquids.

The object of this invention and the advantages attained thereby are substantially as follows:

1. Greater volumetric efliciency per pound of metal embodied in the cylinder'proper, herein after termed the body,vthan has heretofore been attained;

2. Such an arrangement and relation of all machined portions and features of said body, that the machining operations thereof `may be' performed with fewer resettings than has heretofore been possible in pumps of this class, and the consequent reduction of cost of machining;

3. Such a novel relation of all inlet and dis-v charge ports relatively to the plunger bore as to materially facilitate 'the flow of liquid through the pump as well as reduce the cost of machining of said ports; l

4. A completepumping `organization, occupying less space especially in respect tolateral dimensions than has heretofore been produced `in a pump of a similar class.

5.` And,` inasmuch as billets, such as vused in the body of this pump, increase in price per pound as the size of the billet increases, a material reduction of original cost of billet is attained in this pump, because the use of a smaller billet, relatively to the capacity of the pump, is made possible; this relates tc all dimensions of thebody proper and especially to the width thereof.`

My improved pumpto which this application relates, is clearly illustrated in the accompanying drawings, in which:

Fig. 1 is a central, longitudinal, vertical section of the forward half of my improved pump, of the double-acting type. This Vfigure taken alone illustrates very closely a single-acting pump, because the forward half and the rearward half of the pump are approximately duplicates, but exception's to this statement will presently appear.

Fig. 2 is a side elevation of the rearward half of a double-acting pump. l f

Fig. 3 is a vertical, transverse section as if taken on the line A-A of Fig. 2 or a corresponding line of any pair of inlet and discharge ports.

Fig. 4 is a vertical half-section as if taken on the line B-B of Fig. 1, looking in the direction of the pump bodyv proper, as indicated by the arrows.

Fig. 5 is a side view `of the stop for an inlet valve,

Fig. 5X is a side view of a stop for adischarge valve. l

f Fig. 6 is a topyiew of said body for a double# acting pump showing the ports inwhich said stops 5X are mounted,

l Fig. '7 `is a side elevation of the adjacent Vside of Fig.'6.`- 'l f "Fig, 8 `is an end view of tlieadjacent end of Fig; '7 with-the adjacent plunger barrel shown in sectionon the line C'-C of Fig. '7. -y f Fig. 9 is an elevation of the upper side of Fig56 asit would appear if said Figi 6 were turned endfor-end-(not inverted). SaidFigures 6, '7, 8, and 9`relate to 'a' double-acting pump,while Figs. 1, 3, and 4, together with Figs. 5 and 5X illustrate all the essential-portions of a single-acting pump. lThe construction shown in said' drawings is substantiallygas follows: :That `portion |,"of my improved pump, which is usually'termedth'e cylinder, in most typesfof pumps,"and hereintermed the body'proper, has,

formed integrally therewith, and 'ateach end thereof, a plunger barrel 2 in which' a plunger 3 reciprocates. "Said body proper lis of an oblong form the width of whichis approximately onehalf 4the height, andI the length of said body proper' isr substantially twice 4the height, in` a double-actingl pump, such as illustrated in these drawings.

l*A singleeacting pump 'is modifiedin a manner which embodies substantially the construction shown irl-Figi. As shown in the drawings, the `bore of said plunger barrel and of said body, extends through said barrel and into said body proper tofa point adjacent'to, but notthroughy the vertical center line ofv said bodyas shown in Fig. l at the point 4; both ends of said body are identical. in this respect, in a double-acting pump. Beneath said plunger-bore is formed a second bore 5, which is the inlet passage of the pump. Above said plunger bore is formed a third bore 6 which forms the outlet passage` of the pump.

In the intervening wall between the plunger bore and said inlet bore, ports for the mounting of inlet valves 1 are formed, and above said plunger bore, in the wall intermediate thereof and the discharge bore 6, discharge .valves 8 are mounted, through which fluid is discharged and passes out the discharge port 9 which is located at the center of a double-acting pump and may be anywhere intermediate the ends of said bore 6 in a single-acting pump.

The outer end of barrel 2 is supplied with packing, of any suitable form or type, through which the plunger 3 reciprocates. This packing is comparatively short, and beyond the inner end thereof, the bore of the barrel is larger than the plunger thus forming an annular channel 3 around the plunger, which channel extends from the inner face of said packing throughout the remaining length of the plunger bore. This construction materially facilitates the discharge of pumped fluid, in the respect that it flows out through all the valve ports throughout the entire discharge stroke of the plunger. This same advantage obtains in respect to the suction-now of the fluid into the pump.

A Water-jacket l surrounds said plunger barrel, and forms a water space Il therearound, thus adding another feature to the pump whereby it is adapted to pump hot liquids, which, at times. in the oil-refining art, reach a temperature as high as one thousand degrees F. The coeiicient of expansion of the class of steel used in a billet for this pump is substantially of an inch per hundred feet, for each 100 degrees F. rise in temperature, and it must be able to pump oil having a temperature` of 1000 degrees F. The length of the body proper illustrated in the drawings is approximately 5 feet.

A port-closure member for the ports I6, Fig. 7 through which ports the inlet valves 'l are inserted into their seats, is shown in Fig. 5, and in Fig. 3 a side elevation of this closure member is shown in its operative position,` in which it acts as a limit to the upward movement of said valve l in the suction stroke of the pump.

In Fig. 5X, is shown a side elevation of valvelimiting member I8 for the discharge valves, as clearly shown in Fig. l, also in Fig. 3.

In both Figs. 1 and 3 of the drawi-ngs it is shown that the axes of the inlet andthe discharge valves are vertically aligned relatively to each other and to the axis of the plunger bore of the body. This arrangement serves two purposes, namely, economy of lateral space as indicated in Fig. 3. This view also indicates that the seats and adjacent faces of the valve ports may be machined at the same setting of the billet, and without re-adjustment of same. These views also show that, with suitable commercial types of multiple boring or drilling machines, the inlet and the discharge bores may be simultaneously bored at one operation and setting. 'Ihis arrangement is especially advantageous in respect to machining operations, owing to the fact that said bores are in vertical alignment and to. the fact that their longitudinal axes are parallel.

The inlet passage 5 and the ,discharge passage 6,-which are herein sometimes termed the second bore and the "third bore," respectively, extend the full length of the cylinder block or body and the ends thereof are securely closed and sealed, by meansl of the plugs I9 and 20, which are both screw-threaded into their re- 5 spective seats, and also welded therein.

It is shown in Figs. 3 and 4, also in dotted lines in Fig. 8, that, inasmuch as the body I is not sufficiently wide to effect the attachment of the flange 2| `of the Water-jacket l0 thereto, 10 throughout its effective face-area, each side of said body, at a point flush with the end face thereof, is supplied with a mating segment or ange, as 22 and 23,-Fig. 8,-for attachment of the overlapping portion of said jacket flange 2|. Said segments are welded to the body I and may be reinforced by means of radially disposed braces such as 24, Fig. 4.

Having thus described my invention, what I claim and desire to secure by Letters Patent is: In combination, in a pump of the horizontally reciprocating, duplex, longitudinally axially alined plungers type, the casing or body of which consists of a unitary, elongated, rectangular forging, or billet; there being a plunger boreextending centrally into each end of said forging to a point adjacent to the longitudinal center thereof; said bores being in axial alinement and having an intermediate portion of the forging remaining between the adjacent ends thereof; arsuction bore positioned below and extending in parallel relation to said plunger bores, the length of said suction bore being substantially equal to the length of said forging, its outer ends being closed; a main, laterally positioned suction port entering into and intersecting said suction bore; inlet ports leading from said suction bore into each of said plunger bores; an inlet Valve seated in each of said inlet ports; a discharge bore positioned above and extending in axially parallel relation to said, plunger bores; discharge ports leading from each of said plunger bores into said discharge bore; discharge valves seated in said discharge ports for the passage of liquid v therethrough into said discharge bore; a final, 4 laterally positioned main discharge-outlet intersecting said discharge bore; said valve-ports and the valves mounted therein being arranged in vertically alined inlet-and-discharge pairs; a series of ports through the side of said casing, 50 corresponding to number and position of said y inlet valves, through which each inlet Valve respectively is adapted to be inserted, removed or inspected; and a combined valve-keeper and port-closure member adapted and operative to 55 close each of said side ports and to retain its respectively associated valve in operative position.

JEFFERSON M. SHARP.

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